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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZX79-C3V0,143

Name: BZX79-C3V0,143
Brand: Nexperia USA Inc.
SKU: BZX79-C3V0,143
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX79-C3V0,143

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: BZX79-C3V0,143.pdf

Description:: DIODE ZENER 3V 400MW ALF2

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BZX79-C3V0,143 from Nexperia is a ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 3.0 V nominal Zener voltage at 1 mA test current, 500 mW total power dissipation at 50 °C ambient, and 6.0 A non-repetitive peak reverse surge current. It serves as a low-power voltage reference in linear regulators and signal conditioning circuits.

For engineers reviewing the BZX79-C3V0,143 datasheet, BZX79-C3V0,143 pinout, BZX79-C3V0,143 application, or BZX79-C3V0,143 equivalent, this page delivers verified electrical parameters, thermal behavior, junction-to-ambient resistance, temperature coefficient, and real-world use cases - all aligned with Nexperia's official 2002 product data sheet.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its differential resistance of 325–600 Ω at 1 mA ensures predictable regulation slope, while its negative temperature coefficient of −3.5 to −2.1 mV/K supports compensation in multi-diode references.

The device uses axial-leaded SOD27 packaging with cathode band marking, enabling through-hole mounting on PCBs without metallization pads. Thermal resistance is 380 K/W junction-to-ambient (lead length ≤8 mm), limiting continuous operation to 400 mW at Tamb = 50 °C per note 1 in the Absolute Maximum Ratings.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.8 V to 3.2 V at I_Z = 1 mA - defines usable regulation window for low-voltage biasing
Differential Resistance (r_dif)	325 Ω (typ) to 600 Ω (max) at I_Z = 1 mA - determines output impedance and load regulation error
Temperature Coefficient (S_Z)	−3.5 mV/K (min) to −2.1 mV/K (max) - enables predictable drift correction in temperature-sensitive references
Reverse Current (I_R)	10 μA max at V_R = 1 V - confirms low leakage for standby power integrity
Non-repetitive Peak Surge (I_ZSM)	6.0 A at t_p = 100 μs - supports transient overvoltage clamping in ESD-prone interfaces
Total Power Dissipation (P_tot)	500 mW at T_amb = 50 °C - sets maximum continuous DC power in standard PCB mount

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a dark band. Lead diameter: 0.56 mm max; body length: 4.25 mm max; overall length: ≥25.4 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side reference node	Connected to ground or lower potential in shunt regulator topology
Cathode	Zener breakdown terminal / regulated output node	Supplies stable 3.0 V reference when reverse-biased above V_Z

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables cost-optimized voltage referencing where tight regulation is not critical (e.g., power-on reset thresholds)
500 mW power rating	Supports continuous operation in low-current bias networks without heatsinking
Hermetic glass SOD27 package	Ensures long-term stability and moisture resistance in industrial environments
−2.1 to −3.5 mV/K tempco	Allows pairing with positive-tempco components to build compensated reference strings

Applications

Power Supply Monitoring

Signal Level Clamping

Use Scenario: Detecting undervoltage conditions in 3.3 V microcontroller supply rails.

IC Role / Device Role / Timing Role: Shunt-connected Zener providing threshold reference to comparator input.

Use Value: Delivers repeatable 3.0 V trip point with <10 μA leakage, minimizing quiescent current impact on battery-powered systems.

Use Scenario: Limiting analog sensor output swing to protect ADC input stages.

IC Role / Device Role / Timing Role: Reverse-biased clamp limiting positive excursions to 3.0 V + V_F.

Use Value: Prevents ADC saturation using 6.0 A surge capability to absorb short transients without degradation.

Low-Power Reference Source

ESD Protection Node

Use Scenario: Generating stable bias for op-amp input offset trimming in portable audio codecs.

IC Role / Device Role / Timing Role: Zener-based current source feeding precision resistor network.

Use Value: Maintains <0.2% drift across −40 °C to +85 °C due to predictable −2.5 mV/K tempco and low r_dif.

Use Scenario: Secondary protection on USB D+ line against contact discharge events.

IC Role / Device Role / Timing Role: Low-capacitance (≤450 pF) shunt element diverting ESD current to ground.

Use Value: Limits clamping voltage to ≤3.2 V during 8 kV HBM events while adding negligible signal distortion at 480 Mbps.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX79-B3V0,113	±2% tolerance (2.94–3.06 V), lower r_dif (325–600 Ω vs. same range), identical package and surge rating	Required where tighter initial accuracy is needed for calibration-critical circuits	Select when absolute voltage accuracy outweighs cost sensitivity
1N4728A	Same 3.3 V nominal rating (not 3.0 V), 1 W power rating, DO-41 package, higher leakage (50 μA at 1 V)	Used in higher-power shunt regulators where 3.3 V is acceptable and board space allows larger package	Select only if 3.3 V is functionally acceptable and thermal margin exceeds 500 mW

Compared with BZX79-B3V0,113, this part trades initial accuracy for lower unit cost and broader tolerance acceptance; compared with 1N4728A, it offers better low-voltage precision and smaller footprint but lower power handling - making it optimal for space-constrained, battery-operated 3.0 V reference designs.

Availability

BZX79-C3V0,143 is available at Aetrix Electronics and suitable for power supply monitoring, signal clamping, low-power reference sourcing, and ESD protection nodes requiring stable component supply across industrial, computing, and consumer electronics programs.

Supply support for BZX79-C3V0,143 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products business, with focus on automotive, industrial, computing, and consumer markets.

The BZX79 series belongs to Nexperia's legacy Zener diode portfolio designed specifically for low-power voltage regulation and reference applications in cost-sensitive, high-volume electronics.

FAQ

What is the maximum continuous power dissipation for BZX79-C3V0,143 at 70 °C ambient?

At 70 °C ambient, the device must be derated per its thermal resistance (R_{th j-a} = 380 K/W). With a maximum junction temperature of 200 °C, allowable ΔT = 130 K, yielding P_tot = 130 K ÷ 380 K/W ≈ 342 mW. This aligns with the datasheet's linear derating curve from 500 mW at 50 °C to 0 W at 150 °C.

Can BZX79-C3V0,143 be used in surface-mount designs?

No - BZX79-C3V0,143 uses an axial-leaded SOD27 (DO-35) glass package intended for through-hole mounting. It lacks solder pads or gull-wing leads required for reflow assembly. For SMT equivalents, consider Nexperia's MMBZ5226B (SOT-23, 3.0 V, ±5%) or PZM3.0NB (SOD-123, 3.0 V, ±5%).

What is the typical Zener impedance at 5 mA test current?

The datasheet specifies differential resistance (r_dif) at I_Z = 1 mA only (325–600 Ω). At 5 mA, no value is provided for the C-series. However, the B-series counterpart BZX79-B3V0 shows r_dif = 325–600 Ω at 5 mA - suggesting similar behavior. For design-critical impedance modeling, measurement or SPICE simulation with vendor-provided models is recommended.

How does the −2.1 mV/K temperature coefficient affect long-term stability?

A −2.1 mV/K coefficient means output voltage decreases ~2.1 mV per Kelvin rise. Over a 100 K range (−40 °C to +60 °C), that's ~210 mV drift - or ~7% of 3.0 V. This is acceptable for non-precision functions like power-good detection but requires compensation (e.g., series thermistor) in metrology-grade references.

BZX79-C3V0,143 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Cut Tape (CT)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 3 V

Tolerance:: ±5%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 95 Ohms

Current - Reverse Leakage @ Vr:: 10 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ALF2

BZX79-C3V0,143 FAQ

1.How can I place an order for BZX79-C3V0,143 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX79-C3V0,143 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BZX79-C3V0,143 reliable?

The price and inventory of BZX79-C3V0,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C3V0,143 is usually 5 days.

3.What payment methods are accepted for BZX79-C3V0,143?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C3V0,143 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX79-C3V0,143?

BZX79-C3V0,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX79-C3V0,143 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BZX79-C3V0,143?

For technical support, including BZX79-C3V0,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C3V0,143 requirements.

6.How does Aetrix verify that BZX79-C3V0,143 is sourced from the original manufacturer or authorized distributors?

All BZX79-C3V0,143 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX79-C3V0,143 meets industry standards.

7.What is the process for return or replacement of BZX79-C3V0,143?

All BZX79-C3V0,143 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C3V0,143, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BZX79-C3V0,143 part is unused and in its original packaging.

Return procedure for BZX79-C3V0,143:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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